pulse width modulation
[/pʌls wɪdθ ˌmɑːdʒuˈleɪʃən/]
noun
modulação por largura de pulso
1. A technique for controlling the average power delivered to an electrical load by switching the power supply between on and off states at a high frequency, with the ratio of on-time to total cycle time determining the average power.
Pulse width modulation is commonly used in DC motor speed control applications.
A modulação por largura de pulso é comumente utilizada em aplicações de controle de velocidade de motores CC.
2. An electronic control method that varies the width of pulses in a square wave while keeping the frequency constant to regulate power delivery.
The microcontroller uses pulse width modulation to adjust the brightness of the LED.
O microcontrolador utiliza modulação por largura de pulso para ajustar o brilho do LED.
This is a technical term primarily used in engineering, electronics, and computer science contexts. Both Brazil and Portugal use this terminology in academic and industrial settings, though the acronym PWM is universally recognized among engineers. The term gained prominence with the expansion of embedded systems and microcontroller applications in both countries.
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